<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1041393
-->
<head>
  <meta charset="utf-8">
  <title>ImageCapture tests</title>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1041393">ImageCapture tests</a>
<script type="application/javascript">

var repeat = 100;
var count;

// Check if the callback returns even no JS reference on it.
function gcTest(track) {
  return new Promise(function(resolve, reject) {
    count = 0;
    var i;
    var imageCapture;
    for(i = 0; i < repeat; i++) {
      imageCapture = new ImageCapture(track);
      imageCapture.onphoto = function(blob) {
        count++;
        if (count == repeat) {
          ok(true, "pass gc testing");
          resolve(track);
        }
      };
      imageCapture.onerror = function(error) {
        ok(false, "takePhoto failure in gc testing");
        reject();
      };

      imageCapture.takePhoto();
    }
    info("Call gc ");
    SpecialPowers.gc();
  });
}

// Continue calling takePhoto() in rapid succession.
function rapidTest(track) {
  return new Promise(function(resolve, reject) {
    var imageCapture = new ImageCapture(track);
    imageCapture.onphoto = function(blob) {
      count++;
      if (count == repeat) {
        ok(true, "pass raipd takePhoto() testing");
        resolve(track);
      }
    };
    imageCapture.onerror = function(error) {
      ok(false, "takePhoto() failure in rapid testing");
      reject();
    };

    count = 0;
    var i;
    for(i = 0; i < repeat; i++) {
      imageCapture.takePhoto();
    }
  });
}

// Check if the blob is decodable.
function blobTest(track) {
  return new Promise(function(resolve, reject) {
    var imageCapture = new ImageCapture(track);
    imageCapture.onphoto = function(blob) {
      var img = new Image();
      img.onerror = function() {
        ok(false, "fail to decode blob");
        reject();
      }
      img.onload = function() {
        ok(true, "decode blob success");
        resolve(track);
      }
      img.src = URL.createObjectURL(blob.data);
    };
    imageCapture.onerror = function(error) {
      ok(false, "fail to capture image");
    };

    imageCapture.takePhoto();
  });
}

// It should return an error event after disabling video track.
function trackTest(track) {
  return new Promise(function(resolve, reject) {
    var imageCapture = new ImageCapture(track);
    imageCapture.onphoto = function(blob) {
      ok(false, "expect error when video track is disable");
      reject();
    };
    imageCapture.onerror = function(error) {
      ok(error.imageCaptureError.code == error.imageCaptureError.PHOTO_ERROR, "error code is PHOTO_ERROR")
      track.enabled = true;
      resolve(track);
    };

    track.enabled = false;
    imageCapture.takePhoto()
  });
}

function init() {
  return new Promise(function(resolve, reject) {
    // use fake camera, MediaStreamGraph will be the backend of ImageCapture.
    var constraints = {video: true, fake: true}

    window.navigator.mozGetUserMedia(
      constraints,
      function(stream) {
        var track = stream.getVideoTracks()[0];
        resolve(track);
      },
      function(err) {
        reject(err);
      }
    );
  });
}

function start() {
  init().then(function(track) {
    info("ImageCapture track disable test.");
    return trackTest(track);
  }).then(function(track) {
    info("ImageCapture blob test.");
    return blobTest(track);
  }).then(function(track) {
    info("ImageCapture rapid takePhoto() test.");
    return rapidTest(track);
  }).then(function(track) {
    info("ImageCapture multiple instances test.");
    return gcTest(track);
  }).then(SimpleTest.finish);
}

SimpleTest.requestCompleteLog();
SimpleTest.waitForExplicitFinish();

SpecialPowers.pushPrefEnv({"set": [["dom.imagecapture.enabled", true],
                                  ["media.navigator.permission.disabled", true]
                                  ]}, start);
</script>
</pre>
</body>
</html>
